Add garlic, preserved vegetable to wok. Cover with egg. Do not stirfry, let egg 'set.'
Immediately add shrimps and scallions to wok, not in egg.
Flip egg mixture up over shrimps, let 'set.'
Add sprouts, rice noodles. Stir fry all together, breaking apart egg and mixing well. Egg should not be burned.
Add pad thai sauce (and a little broth, if necessary). Mix well. Dish should not be wet nor dry, but moistened.
Serve in a pasta bowl with "3 fingers" of sprouts, peanuts, cilantro, and lemon wedge.